Question
 A solution contains 1/ 10000 moles/I H+ ions. What is
the concentration of hydroxyl ions in this solution?Solution
Product of H+ and OH- concentration= (H+) 
 (OH-) = 10-14                                                                                   = (10-4) ×(OH-)= 10-14                                                                                   = (OH-)= 10-14/10-4= 10-10 moles/litre
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